a new poll of voters shows the president's lead slung to four points. and there is last night, slamming romney. >> we reinvented a dying auto industry supporting one in eight ohio jobs. >> with the race tightening the showdown has greater stakes vice president biden expected to come out and challenge ryan. >> i've been doing mostly is frankly studying up on congressman ryan's position. on the issues. i don't want to say anything that is not accurate. >> and the. >> joe is just going to come flying at us. it's -- it seems clear this strategy is just calling us liars. and this is to go into a mud pit. >> both are well versed on policy issues so a challenge both may be trying to explain without getting too into the weeds and turning off voters at home. >> there is abc 7 broadcasting the live debate tomorrow night at 6:00 and after that the new drama "last resort". at 10 there is a special presentation of what would you do. >> and race for white house takes center stage tonight on world news at 5:30 here on abc 7 there is some key issues and mitt romney's r